Thomas Lake
Portage County, Wisconsin · WBIC 200300
The DNR lists this lake's watershed (Waupaca River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
32 acres
Max depth
28 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
10.5 ft
Clear, measured Jul 2026
A warm-water lake type: the DNR groups it with lakes that warm up through summer. This describes the lake type in general, not this lake in particular.
Outline
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1969), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
10.5 ft Secchi depthClear
Last measured Jul 21, 2026. 8 readings on record, 2025 to 2026.
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station Thomas Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
Last measured Jul 21, 2026, too long ago to show as the current temperature.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Stocking history
- Rainbow Troutlast stocked 2025 (yearling); stocked in 16 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
Boat landings
- 1Thomas Lake AccessBoat ramp · Gravel surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Portage County
- Ell Lake1.5 miles away
- Lake Julia2.0 miles away
- Adams Lake2.6 miles away
- Lake Emily2.6 miles away
- Bear Lake2.6 miles away
- Ostrowski Lake3.1 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Stocking historyWisconsin DNR annual fish stocking summary, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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